Negative refraction of modulated electromagnetic waves

被引:133
作者
Smith, DR [1 ]
Schurig, D
Pendry, JB
机构
[1] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA
[2] Univ London Imperial Coll Sci Technol & Med, Blackett Lab, London SW7 2BU, England
关键词
D O I
10.1063/1.1512828
中图分类号
O59 [应用物理学];
学科分类号
摘要
We show that a modulated Gaussian beam undergoes negative refraction at the interface between a positive and negative refractive index material. While the refraction of the beam is clearly negative, the modulation interference fronts are not normal to the group velocity, and thus exhibit a sideways motion relative to the beam-an effect due to the inherent frequency dispersion associated with the negative index medium. In particular, the interference fronts appear to bend in a manner suggesting positive refraction, such that for a plane wave, the true direction of the energy flow associated with the refracted beam is not obvious. (C) 2002 American Institute of Physics.
引用
收藏
页码:2713 / 2715
页数:3
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